Yes! - iD14 is entirely bus-powered from the USB connection.
The iD14 MkII will power up fully from the USB, including 2 channels of full phantom power (+48v ±4V, 10mA). This requires a USB3.0 connection which provides 900mA of bus power or higher.
When the iD14 Mk2 is connected to a USB-C port which provides 1.5A of bus power, the headphone headroom is automatically increased to give more output level to your favourite headphones.